The hawk-eye was first used in 2001 and it took seven more years to use the same technology to correct umpiring errors. There has been a lot said about the faults in the current system. The Indians, after losing multiple reviews due to poor reviews in Sri Lanka started questioning the system itself and haven't used it in a bilateral series,since then. But, the system is still doing an efficient job in correcting major umpiring errors. Thus, serving its purpose. Most predictions that the hawk-eye comes up with seem to be fairly believable. There could be minor alterations in the predicted trajectory of the ball, but it would still be better than the trajectory predicted by the umpire which is why there seems to be very less logic in what the Indians have to say. Coming to Hot Spot, it picks up all edges that a human ear can pick up and a few edges that th...